1. CIB W040, ‘Minutes and Proceedings, Heat and Moisture Transfer in Buildings’, Lund, Sweden, Sep. 1991. Coordinator and Editor: H. Hens.
2. CIB Proceedings, Publication 173, ‘Heat and Moisture Transfer in Buildings’, Minutes and Proceedings of W40 Meeting in Sopron, Hungary, Sep. 1993. Coordinator: H. Hens.
3. CIB Proceedings, Publication 213, ‘Heat and Moisture Transfer in Buildings’, Minutes and Proceedings of W40 Meeting in Kyoto, Japan, Oct. 1997. Coordinator: I. Samuelson.
4. Hens, H., ‘Condensation and energy’, International Energy Agency (IEA), Energy Conservation in Building and Community Systems, Final Report, IEA-ANNEX XIV, 1991.
5. Hens, H., ‘Heat, air and moisture transfer in insulated envelope parts’, International Energy Agency (IEA), Energy Conservation in Building and Community Systems, Final Report, Volume 1, Task 1: Modelling, IEA Annex XXIV, 1996.